Explanation:
Given that,
Initial speed of a ranger, u = 36.2 mi/h
Distance dove by the ranger, d = 205 ft
Due to the application of brakes, the acceleration reached is 8.83 ft/s².
We need to find the maximum reaction time allowed if she is to avoid hitting the deer.
We know that,
1 mph = 1.46667 ft/s
36.2 mi/h = 53.09 ft/s
Let t is time.
Using second equation of kinematics to find it as follows :
The above is a quadratic equation. We need to solve it for t as follows :
Hence, 416.01 seconds is the maximum reaction time allowed if she is to avoid hitting the deer.
Answer:
20meters per second
Explanation:
2000meters/50seconds= 20m/s
Answer:
B
Explanation:
Fermium is a synthetic element with the symbol Fm and atomic number 100. It is an actinide and the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared.[3] A total of 19 isotopes are known, with 257Fm being the longest-lived with a half-life of 100.5 days.
It was discovered in the debris of the first hydrogen bomb explosion in 1952, and named after Enrico Fermi, one of the pioneers of nuclear physics. Its chemistry is typical for the late actinides, with a preponderance of the +3 oxidation state but also an accessible +2 oxidation state. Owing to the small amounts of produced fermium and all of its isotopes having relatively short half-lives, there are currently no uses for it outside basic scientific research.
